Within a corporate/domain environment, you might expect some things to be blocked, but the strange thing is that from a cmd prompt, pinging those addresses is successful. Similarly www.google.co.uk fails from AutoIt ping, but is alright from cmd. Internet access is permitted, and Firefox can go to AutoIt and Google. (I tried another computer at work, same.) With the same computer, on WiFi at home, both ping methods succeed.

How is the corporate environment blocking AutoIt ping, but not cmd ping?